package com.itheima.web.controller.store;


import com.github.pagehelper.PageInfo;
import com.itheima.domain.store.Course;
import com.itheima.utils.BeanUtil;
import com.itheima.web.controller.BaseServlet;
import org.apache.commons.lang3.StringUtils;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;


@WebServlet("/store/course")
public class CourseServlet extends BaseServlet {
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String operation = req.getParameter("operation");
        if ("list".equals(operation)) {
            findAll(req, resp);
        } else if ("toAdd".equals(operation)) {
            toAdd(req, resp);
        } else if ("save".equals(operation)) {
            save(req, resp);
        } else if ("delete".equals(operation)) {
            delete(req, resp);
        } else if ("toEdit".equals(operation)) {
            toEdit(req, resp);
        } else if ("edit".equals(operation)) {
            update(req, resp);
        }
    }

    private void findAll(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        int pageNum = 1;
        int pageSize = 5;
        if (StringUtils.isNoneBlank(req.getParameter("page"))) {
            pageNum = Integer.parseInt(req.getParameter("page"));
        }
        if (StringUtils.isNoneBlank(req.getParameter("size"))) {
            pageSize = Integer.parseInt(req.getParameter("size"));
        }

        PageInfo all = courseService.findAll(pageNum, pageSize);
        req.setAttribute("page", all);

        req.getRequestDispatcher("/WEB-INF/pages/store/course/list.jsp").forward(req, resp);

    }


    private void save(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        Course course = BeanUtil.fillBean(req, Course.class, "yyyyy-MM-dd");
//        CourseServiceImpl courseService = new CourseServiceImpl();

        courseService.save(course);
        resp.sendRedirect(req.getContextPath() + "/store/course?operation=list");

    }

    private void toAdd(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        req.getRequestDispatcher("/WEB-INF/pages/store/course/add.jsp").forward(req, resp);

    }

    private void delete(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String[] id = req.getParameter("id").split(",");
        courseService.delete(id);
        resp.sendRedirect(req.getContextPath() + "/store/course?operation=list");

    }

    private void toEdit(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String id = req.getParameter("id");
        Course course = courseService.findById(id);
        req.setAttribute("course", course);
        req.getRequestDispatcher("/WEB-INF/pages/store/course/update.jsp").forward(req,resp);
    }

    private void update(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        Course course =  BeanUtil.fillBean(req, Course.class,"yyyy-MM-dd");
        courseService.update(course);
        resp.sendRedirect(req.getContextPath()+"/store/course?operation=list");
    }


    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        this.doPost(req, resp);
    }
}
